I have an Evo3D on Sprint. I have successfully unlocked it and it shows S-Off. I have the stock ROM installed. I tried to install 4EXT (to install custom ROMS), BusyBox, and Superuser and all fail. I ran Root Checker and it says I don't have Root access. WHAT? I also can't run the root Tether app. What is the problem? Is there more to "rooting" than just unlocking and having S-Off?